/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.eagle.audit.common;

import org.apache.eagle.audit.listener.AuditListener;
import org.apache.eagle.audit.listener.AuditListenerProxy;

public final class AuditListenerMap extends BaseAuditListenerMap<AuditListener> {
	
    private static final AuditListener[] EMPTY = {};

    @Override
    protected AuditListener[] newArray(int length) {
        return (0 < length) ? new AuditListener[length] : EMPTY;
    }

    @Override
    protected AuditListener newProxy(String name, AuditListener listener) {
        return new AuditListenerProxy(name, listener);
    }

    public final AuditListener extract(AuditListener listener) {
        while (listener instanceof AuditListener) {
            listener = ((AuditListenerProxy) listener).getListener();
        }
        return listener;
    }
}